Upright floor scrubber



FIG. 1 is a front perspective view of the upright floor scrubber showing our ornamental design;

FIG. 2 is a front view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is left side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The dashed broken lines show portions of the upright floor scrubber that form no part of the claimed design. The dot-dash broken lines in FIG. 7 , show boundaries of the upright floor scrubber that form no part of the claimed design. 

CLAIM We claim the ornamental design for an upright floor scrubber, as shown and described. 